peco/peco — pull request #111 by lestrrat (2014-06-30 06:00:33+00:00)
Title: Check that the specified command is actually there for custom matchers

Now specifying tools that don't exist (i.e. you make a typo), you get:

```
Verification for custom matcher failed: exec: "/path/to/migemocrep": stat /path/to/migemocrep: no such file or directory
```